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[Launchpad Bug Tracker <1183817@xxxxxxxxxxxxxxxxxx>]

[Expired for neutron because there has been no activity for 60 days.]

** Changed in: neutron
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1183817

Title:
  instances created in newly created subnet are not accessible via
  private range ip adress 10.0.11.2 from devstack host machine

Status in OpenStack Neutron (virtual network service):
  Expired

Bug description:
  we have  single node devstack (branch: stable/grizzly) installation.

  subnet list:
  first is subnet of default "private" network subnet

  | 6ea6f812-3ad4-4414-ba9e-d57a44ae15cc |                                | 10.0.55.0/24     | {"start": "10.0.55.2", "end": "10.0.55.254"}       |
  | da7ad45b-6b92-426e-8c6b-1453f271e350 | not_working_subnet    | 10.0.11.0/24     | {"start": "10.0.11.2", "end": "10.0.11.254"} |

  not_working_subnet is connected to a router which is also connected to
  public network via its gateway inerface

  when creating VM in "private" network them is accessible (ping, ssh) from devstack host machine on its ip e.g. 10.0.55.2.
  if i create VM in "not_working_subnet" then is not accessible via its ip e.g. 10.0.11.2.

  We have found problem is probably that routing table of devstack host
  machine is missing route routing packets to router gateway interface.
  I added bellow route then instnances on not_working_subnet are also
  accessible from host machine and everything works fine

  Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
  10.0.11.0       XX.YY.ZZ.205   255.255.255.0   UG    0      0        0 br-ex

  route for private network is already present therefore for private
  network everything works fine

  Kernel IP routing table
  Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
  10.0.55.0       XX.YY.ZZ.194   255.255.255.0   UG    0      0        0 br-ex

  
  We assume that routing table of host machine should get automatically updated when subnet created with connection to public network via router.

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